Effective generation of transgenic mice by Bovine papillomavirus type 1 based self-replicating plasmid that is maintained as extrachromosomal genetic element in three generations of animalsMännik, Andres; Piirsoo, Marko; Nordström, Kristina; Ustav, Ene; Vennström, Björn; Ustav, MartPlasmid2003 / 3, p. 193-204